Place carrots in bottom of slow cooker.
In a large bowl, use hands or a fork to gently combine meatball ingredients. Form meat mixture into 1-inch balls.
Place meatballs on top of carrots in the slow cooker.
In a separate bowl, combine tomato paste, broth, marinara, seasoned salt, oregano, and basil. Pour over meatballs.
Cover and cook on LOW for about 4 hours or on HIGH for about 2 hours. For a thinner soup rather than a stew, add extra broth until it reaches desired consistency.
Steam vegetables in microwave just until crisp-tender (about 3-4 minutes). Stir vegetables into stew and serve over pasta or rice, if desired. Garnish with fresh parsley or fresh basil.
